Academic Journal
Experimental and numerical study of combustion in pipe cutting operations with hydrogen-blending gas.
| العنوان: | Experimental and numerical study of combustion in pipe cutting operations with hydrogen-blending gas. |
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| المؤلفون: | Guo, Baoling1 (AUTHOR) guobaoling@bjgas.com, Di, Xin1 (AUTHOR), Zhang, Yanqi1 (AUTHOR), Li, Wenzhe1 (AUTHOR), Yan, Song1 (AUTHOR) |
| المصدر: | International Journal of Hydrogen Energy. Aug2024, Vol. 77, p1403-1415. 13p. |
| مصطلحات موضوعية: | *FLAME, *COMBUSTION, *HEAT radiation & absorption, *COMBUSTION gases, *DOPING agents (Chemistry), *NATURAL gas |
| مستخلص: | This study investigated the flame combustion of gas-containing pipe cutting operations by combining experimental and numerical simulation techniques. Based on the empirical flame length formula and experimental and numerical simulation flame length data, a flame length formula for gas outlet with large aspect ratio was proposed. In the experimental phase, cutting experiments were conducted with cutting slit lengths of 1–11 cm for pipe pressures of 10–550 Pa and hydrogen doping ratios of 0%, 10%, and 20%. The flame lengths were then measured. A hydrogen-doped natural gas combustion model based on the vortex dissipation conceptual model and Grimech-3.0 mechanism was established to simulate the experimental conditions. The flame lengths derived from the numerical simulation were in good agreement with the experimentally measured flame lengths, with an average error of 7.02%. This indicates that the reliability of the numerical model can be verified. The effects of hydrogen doping ratio, tube pressure, and cutting slit length on flame length and thermal radiation range were investigated using the control variable method. The results demonstrated that hydrogen doping reduced flame length and flame length away from the flame. Furthermore, an increase in pipe pressure and single cut length also resulted in an increase in flame length. It was observed that under normal operating conditions, a safe intensity of thermal radiation could be maintained within the operating distance when the operator wore protective clothing. • The reveal that hydrogen blending enhances combustion stability and reduces the jet flame height and flame resistance height. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: | Academic Search Index |
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